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1 | - | // DS1302 RTC |
1 | + | |
2 | - | // ---------- |
2 | + | |
3 | int pin = 2; | |
4 | - | // By arduino.cc user "Krodal". |
4 | + | |
5 | - | // June 2012 |
5 | + | |
6 | - | // Open Source / Public Domain |
6 | + | |
7 | ||
8 | - | // Using Arduino 1.0.1 |
8 | + | |
9 | ||
10 | - | // Documentation: datasheet |
10 | + | |
11 | #define DS1302_SCLK 6 // Arduino pin for the Serial Clock | |
12 | #define DS1302_IO 7 // Arduino pin for the Data I/O | |
13 | - | // The DS1302 uses a 3-wire interface: |
13 | + | |
14 | - | // - bidirectional data. |
14 | + | |
15 | - | // - clock |
15 | + | |
16 | - | // - chip select |
16 | + | |
17 | - | // It is not I2C, not OneWire, and not SPI. |
17 | + | |
18 | - | // So the standard libraries can not be used. |
18 | + | |
19 | - | // Even the shiftOut() function is not used, since it |
19 | + | |
20 | - | // could be too fast (it might be slow enough, |
20 | + | |
21 | - | // but that's not certain). |
21 | + | |
22 | #define DS1302_MINUTES 0x82 | |
23 | - | // I wrote my own interface code according to the datasheet. |
23 | + | |
24 | - | // Any three pins of the Arduino can be used. |
24 | + | |
25 | - | // See the first defines below this comment, |
25 | + | |
26 | - | // to set your own pins. |
26 | + | |
27 | #define DS1302_YEAR 0x8C | |
28 | - | // The "Chip Enable" pin was called "/Reset" before. |
28 | + | |
29 | #define DS1302_TRICKLE 0x90 | |
30 | - | // The chip has internal pull-down registers. |
30 | + | |
31 | - | // This keeps the chip disabled, even if the pins of |
31 | + | |
32 | - | // the Arduino are floating. |
32 | + | |
33 | #define DS1302_RAMSTART 0xC0 | |
34 | #define DS1302_RAMEND 0xFC | |
35 | - | // Range |
35 | + | |
36 | - | // ----- |
36 | + | |
37 | - | // seconds : 00-59 |
37 | + | |
38 | - | // minutes : 00-59 |
38 | + | |
39 | - | // hour : 1-12 or 0-23 |
39 | + | |
40 | - | // date : 1-31 |
40 | + | |
41 | - | // month : 1-12 |
41 | + | |
42 | - | // day : 1-7 |
42 | + | |
43 | - | // year : 00-99 |
43 | + | |
44 | // is like programming an AVR microcontroller. | |
45 | // But instead of using "(1<<X)", or "_BV(X)", | |
46 | - | // Burst mode |
46 | + | |
47 | - | // ---------- |
47 | + | |
48 | - | // In burst mode, all the clock data is read at once. |
48 | + | |
49 | - | // This is to prevent a rollover of a digit during reading. |
49 | + | |
50 | - | // The read data is from an internal buffer. |
50 | + | |
51 | #define DS1302_D4 4 | |
52 | - | // The burst registers are commands, rather than addresses. |
52 | + | |
53 | - | // Clock Data Read in Burst Mode |
53 | + | |
54 | - | // Start by writing 0xBF (as the address), |
54 | + | |
55 | - | // after that: read clock data |
55 | + | |
56 | - | // Clock Data Write in Burst Mode |
56 | + | |
57 | - | // Start by writing 0xBE (as the address), |
57 | + | |
58 | - | // after that: write clock data |
58 | + | |
59 | - | // Ram Data Read in Burst Mode |
59 | + | |
60 | - | // Start by writing 0xFF (as the address), |
60 | + | |
61 | - | // after that: read ram data |
61 | + | |
62 | - | // Ram Data Write in Burst Mode |
62 | + | |
63 | - | // Start by writing 0xFE (as the address), |
63 | + | |
64 | - | // after that: write ram data |
64 | + | |
65 | #define DS1302_CH DS1302_D7 // 1 = Clock Halt, 0 = start | |
66 | ||
67 | - | // Ram |
67 | + | |
68 | - | // --- |
68 | + | |
69 | - | // The DS1302 has 31 of ram, which can be used to store data. |
69 | + | |
70 | - | // The contents will be lost if the Arduino is off, |
70 | + | |
71 | - | // and the backup battery gets empty. |
71 | + | |
72 | - | // It is better to store data in the EEPROM of the Arduino. |
72 | + | |
73 | - | // The burst read or burst write for ram is not implemented |
73 | + | |
74 | - | // in this code. |
74 | + | |
75 | #define DS1302_ROUT0 DS1302_D0 | |
76 | #define DS1302_ROUT1 DS1302_D1 | |
77 | - | // Trickle charge |
77 | + | |
78 | - | // -------------- |
78 | + | |
79 | - | // The DS1302 has a build-in trickle charger. |
79 | + | |
80 | - | // That can be used for example with a lithium battery |
80 | + | |
81 | - | // or a supercap. |
81 | + | |
82 | - | // Using the trickle charger has not been implemented |
82 | + | |
83 | - | // in this code. |
83 | + | |
84 | ||
85 | // Structure for the first 8 registers. | |
86 | // These 8 bytes can be read at once with | |
87 | // the 'clock burst' command. | |
88 | // Note that this structure contains an anonymous union. | |
89 | // It might cause a problem on other compilers. | |
90 | typedef struct ds1302_struct | |
91 | { | |
92 | uint8_t Seconds: | |
93 | 4; // low decimal digit 0-9 | |
94 | uint8_t Seconds10: | |
95 | 3; // high decimal digit 0-5 | |
96 | uint8_t CH: | |
97 | 1; // CH = Clock Halt | |
98 | uint8_t Minutes: | |
99 | 5; | |
100 | uint8_t Minutes10: | |
101 | 2; | |
102 | uint8_t reserved1: | |
103 | 1; | |
104 | union | |
105 | { | |
106 | struct | |
107 | { | |
108 | uint8_t Hour: | |
109 | 4; | |
110 | uint8_t Hour10: | |
111 | 1; | |
112 | uint8_t reserved2: | |
113 | 1; | |
114 | uint8_t hour_12_24: | |
115 | 1; // 0 for 24 hour format | |
116 | } | |
117 | h24; | |
118 | struct | |
119 | { | |
120 | uint8_t Hour: | |
121 | 4; | |
122 | uint8_t Hour10: | |
123 | 1; | |
124 | uint8_t AM_PM: | |
125 | 1; // 0 for AM, 1 for PM | |
126 | uint8_t reserved2: | |
127 | 1; | |
128 | uint8_t hour_12_24: | |
129 | 1; // 1 for 12 hour format | |
130 | } | |
131 | h12; | |
132 | }; | |
133 | uint8_t Date: | |
134 | 4; | |
135 | uint8_t Date10: | |
136 | 2; | |
137 | uint8_t reserved3: | |
138 | 2; | |
139 | uint8_t Month: | |
140 | 4; | |
141 | uint8_t Month10: | |
142 | 1; | |
143 | uint8_t reserved4: | |
144 | 3; | |
145 | uint8_t Day: | |
146 | 3; | |
147 | uint8_t reserved5: | |
148 | 5; | |
149 | uint8_t Year: | |
150 | 4; | |
151 | uint8_t Year10: | |
152 | 4; | |
153 | uint8_t reserved6: | |
154 | 7; | |
155 | uint8_t WP: | |
156 | 1; // WP = Write Protect | |
157 | }; | |
158 | ||
159 | ||
160 | // global variables | |
161 | volatile byte increaseHour = 0; | |
162 | volatile byte increaseHour10 = 0; | |
163 | uint32_t lastMillis = 0; | |
164 | ||
165 | ||
166 | void setup() | |
167 | { | |
168 | ds1302_struct rtc; | |
169 | ||
170 | ||
171 | Serial.begin(9600); | |
172 | Serial.println(F("DS1302 Real Time Clock")); | |
173 | Serial.println(F("June 2012")); | |
174 | ||
175 | ||
176 | // Start by clearing the Write Protect bit | |
177 | // Otherwise the clock data cannot be written | |
178 | // The whole register is written, | |
179 | // but the WP-bit is the only bit in that register. | |
180 | DS1302_write (DS1302_ENABLE, 0); | |
181 | ||
182 | // Disable Trickle Charger. | |
183 | DS1302_write (DS1302_TRICKLE, 0x00); | |
184 | ||
185 | // Remove the next define, | |
186 | // after the right date and time are set. | |
187 | #define SET_DATE_TIME_JUST_ONCE | |
188 | #ifdef SET_DATE_TIME_JUST_ONCE | |
189 | // Set a time and date | |
190 | // This also clears the CH (Clock Halt) bit, | |
191 | // to start the clock. | |
192 | ||
193 | // Fill the structure with zeros to make | |
194 | // any unused bits zero | |
195 | memset ((char *) &rtc, 0, sizeof(rtc)); | |
196 | ||
197 | rtc.Seconds = 0; | |
198 | rtc.Seconds10 = 0; | |
199 | rtc.CH = 0; // 1 for Clock Halt, 0 to run; | |
200 | rtc.Minutes = 0; | |
201 | rtc.Minutes10 = 0; | |
202 | rtc.h24.Hour = 0; | |
203 | rtc.h24.Hour10 = 0; | |
204 | rtc.h24.hour_12_24 = 0; // 0 for 24 hour format | |
205 | rtc.Date = 0; | |
206 | rtc.Date10 = 0; | |
207 | rtc.Month = 0; | |
208 | rtc.Month10 = 0; | |
209 | rtc.Day = 0; | |
210 | rtc.Year = 0; | |
211 | rtc.Year10 = 0; | |
212 | rtc.WP = 0; | |
213 | ||
214 | // Write all clock data at once (burst mode). | |
215 | DS1302_clock_burst_write( (uint8_t *) &rtc); | |
216 | #endif | |
217 | ||
218 | ||
219 | //interrupt voor knop | |
220 | pinMode(pin, INPUT); | |
221 | //attachInterrupt(0, uurErbij, RISING); | |
222 | ||
223 | } | |
224 | ||
225 | ||
226 | void loop(){ | |
227 | ||
228 | ds1302_struct rtc; | |
229 | char buffer[80]; // the code uses 70 characters. | |
230 | ||
231 | if (millis() - lastMillis > 1000) { | |
232 | lastMillis = millis(); | |
233 | // Read all clock data at once (burst mode). | |
234 | DS1302_clock_burst_read( (uint8_t *) &rtc); | |
235 | ||
236 | sprintf(buffer, "Time = %02d:%02d:%02d, ", \ | |
237 | (rtc.h24.Hour10 * 10) + rtc.h24.Hour, \ | |
238 | (rtc.Minutes10 * 10) + rtc.Minutes, \ | |
239 | (rtc.Seconds10 * 10) + rtc.Seconds); | |
240 | Serial.print(buffer); | |
241 | ||
242 | sprintf(buffer, "Date(day of month) = %d, Month = %d, " \ | |
243 | "Day(day of week) = %d, Year = %d", \ | |
244 | (rtc.Date10 * 10) + rtc.Date, \ | |
245 | (rtc.Month10 * 10) + rtc.Month, \ | |
246 | rtc.Day, \ | |
247 | 2000 + (rtc.Year10 * 10) + rtc.Year); | |
248 | Serial.println(buffer); | |
249 | } | |
250 | if (increaseHour) { | |
251 | DS1302_clock_burst_read( (uint8_t *) &rtc); | |
252 | rtc.h24.Hour++; | |
253 | DS1302_clock_burst_write( (uint8_t *) &rtc); | |
254 | increaseHour = 0; | |
255 | } | |
256 | ||
257 | if (increaseHour10) { | |
258 | DS1302_clock_burst_read( (uint8_t *) &rtc); | |
259 | rtc.h24.Hour10++; | |
260 | rtc.h24.Hour=0; | |
261 | ||
262 | DS1302_clock_burst_write( (uint8_t *) &rtc); | |
263 | increaseHour10 = 0; | |
264 | } | |
265 | ||
266 | ||
267 | // sfqsfqs | |
268 | ||
269 | int value = digitalRead(pin); | |
270 | //uur = rtc.h24.Hours; | |
271 | ||
272 | if(value != previousValue){ | |
273 | ||
274 | if (rtc.h24.Hour == 9) { | |
275 | Serial.println("sdqf"); | |
276 | } | |
277 | Serial.println(value); | |
278 | if(value){ | |
279 | uurErbij(); | |
280 | } | |
281 | }; | |
282 | previousValue = value; | |
283 | ||
284 | ||
285 | } | |
286 | ||
287 | ||
288 | // -------------------------------------------------------- | |
289 | // DS1302_clock_burst_read | |
290 | // | |
291 | // This function reads 8 bytes clock data in burst mode | |
292 | // from the DS1302. | |
293 | // | |
294 | // This function may be called as the first function, | |
295 | // also the pinMode is set. | |
296 | // | |
297 | void DS1302_clock_burst_read( uint8_t *p) | |
298 | { | |
299 | int i; | |
300 | ||
301 | _DS1302_start(); | |
302 | ||
303 | // Instead of the address, | |
304 | // the CLOCK_BURST_READ command is issued | |
305 | // the I/O-line is released for the data | |
306 | _DS1302_togglewrite( DS1302_CLOCK_BURST_READ, true); | |
307 | ||
308 | for (i=0; i<8; i++) | |
309 | { | |
310 | *p++ = _DS1302_toggleread(); | |
311 | } | |
312 | _DS1302_stop(); | |
313 | } | |
314 | ||
315 | ||
316 | // -------------------------------------------------------- | |
317 | // DS1302_clock_burst_write | |
318 | // | |
319 | // This function writes 8 bytes clock data in burst mode | |
320 | // to the DS1302. | |
321 | // | |
322 | // This function may be called as the first function, | |
323 | // also the pinMode is set. | |
324 | // | |
325 | void DS1302_clock_burst_write( uint8_t *p) | |
326 | { | |
327 | int i; | |
328 | ||
329 | _DS1302_start(); | |
330 | ||
331 | // Instead of the address, | |
332 | // the CLOCK_BURST_WRITE command is issued. | |
333 | // the I/O-line is not released | |
334 | _DS1302_togglewrite( DS1302_CLOCK_BURST_WRITE, false); | |
335 | ||
336 | for (i=0; i<8; i++) | |
337 | { | |
338 | // the I/O-line is not released | |
339 | _DS1302_togglewrite( *p++, false); | |
340 | } | |
341 | _DS1302_stop(); | |
342 | } | |
343 | ||
344 | ||
345 | // -------------------------------------------------------- | |
346 | // DS1302_read | |
347 | // | |
348 | // This function reads a byte from the DS1302 | |
349 | // (clock or ram). | |
350 | // | |
351 | // The address could be like "0x80" or "0x81", | |
352 | // the lowest bit is set anyway. | |
353 | // | |
354 | // This function may be called as the first function, | |
355 | // also the pinMode is set. | |
356 | // | |
357 | uint8_t DS1302_read(int address) | |
358 | { | |
359 | uint8_t data; | |
360 | ||
361 | // set lowest bit (read bit) in address | |
362 | bitSet (address, DS1302_READBIT); | |
363 | ||
364 | _DS1302_start(); | |
365 | // the I/O-line is released for the data | |
366 | _DS1302_togglewrite (address, true); | |
367 | data = _DS1302_toggleread (); | |
368 | _DS1302_stop(); | |
369 | ||
370 | return (data); | |
371 | } | |
372 | ||
373 | ||
374 | // -------------------------------------------------------- | |
375 | // DS1302_write | |
376 | // | |
377 | // This function writes a byte to the DS1302 (clock or ram). | |
378 | // | |
379 | // The address could be like "0x80" or "0x81", | |
380 | // the lowest bit is cleared anyway. | |
381 | // | |
382 | // This function may be called as the first function, | |
383 | // also the pinMode is set. | |
384 | // | |
385 | void DS1302_write(int address, uint8_t data) | |
386 | { | |
387 | // clear lowest bit (read bit) in address | |
388 | bitClear (address, DS1302_READBIT); | |
389 | ||
390 | _DS1302_start(); | |
391 | // don't release the I/O-line | |
392 | _DS1302_togglewrite (address, false); | |
393 | // don't release the I/O-line | |
394 | _DS1302_togglewrite (data, false); | |
395 | _DS1302_stop(); | |
396 | } | |
397 | ||
398 | ||
399 | // -------------------------------------------------------- | |
400 | // _DS1302_start | |
401 | // | |
402 | // A helper function to setup the start condition. | |
403 | // | |
404 | // I don't use an 'init' function. | |
405 | // But now the pinMode is set every time. | |
406 | // That's not a big deal, and it's valid. | |
407 | void _DS1302_start(void) | |
408 | { | |
409 | digitalWrite (DS1302_CE, LOW); // default, not enabled | |
410 | pinMode (DS1302_CE, OUTPUT); | |
411 | ||
412 | digitalWrite (DS1302_SCLK, LOW); // default, clock low | |
413 | pinMode (DS1302_SCLK, OUTPUT); | |
414 | ||
415 | pinMode (DS1302_IO, OUTPUT); | |
416 | ||
417 | digitalWrite (DS1302_CE, HIGH); // start the session | |
418 | delayMicroseconds(4); // tCC = 4us | |
419 | } | |
420 | ||
421 | ||
422 | // -------------------------------------------------------- | |
423 | // _DS1302_stop | |
424 | // | |
425 | // A helper function to finish the communication. | |
426 | // | |
427 | void _DS1302_stop(void) | |
428 | { | |
429 | // Set CE low | |
430 | digitalWrite (DS1302_CE, LOW); | |
431 | ||
432 | delayMicroseconds(4); // tCWH = 4us | |
433 | } | |
434 | ||
435 | ||
436 | // -------------------------------------------------------- | |
437 | // _DS1302_toggleread | |
438 | // | |
439 | // A helper function for reading a byte with bit toggle | |
440 | // | |
441 | // This function assumes that the SCLK is still high. | |
442 | // | |
443 | uint8_t _DS1302_toggleread(void) | |
444 | { | |
445 | uint8_t i, data; | |
446 | ||
447 | data = 0; | |
448 | for (i = 0; i <= 7; i++) | |
449 | { | |
450 | // Issue a clock pulse for the next databit. | |
451 | // If the 'togglewrite' function was used before | |
452 | // this function, the SCLK is already high. | |
453 | digitalWrite (DS1302_SCLK, HIGH); | |
454 | delayMicroseconds(1); | |
455 | ||
456 | // Clock down, data is ready after some time. | |
457 | digitalWrite (DS1302_SCLK, LOW); | |
458 | delayMicroseconds(1); // tCL=1000ns, tCDD=800ns | |
459 | ||
460 | // read bit, and set it in place in 'data' variable | |
461 | bitWrite (data, i, digitalRead(DS1302_IO)); | |
462 | } | |
463 | return (data); | |
464 | } | |
465 | ||
466 | ||
467 | // -------------------------------------------------------- | |
468 | // _DS1302_togglewrite | |
469 | // | |
470 | // A helper function for writing a byte with bit toggle | |
471 | // | |
472 | // The 'release' parameter is for a read after this write. | |
473 | // It will release the I/O-line and will keep the SCLK high. | |
474 | // | |
475 | void _DS1302_togglewrite(uint8_t data, uint8_t release) | |
476 | { | |
477 | int i; | |
478 | ||
479 | for (i = 0; i <= 7; i++) | |
480 | { | |
481 | // set a bit of the data on the I/O-line | |
482 | digitalWrite (DS1302_IO, bitRead(data, i)); | |
483 | delayMicroseconds(1); // tDC = 200ns | |
484 | ||
485 | // clock up, data is read by DS1302 | |
486 | digitalWrite (DS1302_SCLK, HIGH); | |
487 | delayMicroseconds(1); // tCH = 1000ns, tCDH = 800ns | |
488 | ||
489 | if (release && i == 7) | |
490 | { | |
491 | // If this write is followed by a read, | |
492 | // the I/O-line should be released after | |
493 | // the last bit, before the clock line is made low. | |
494 | // This is according the datasheet. | |
495 | // I have seen other programs that don't release | |
496 | // the I/O-line at this moment, | |
497 | // and that could cause a shortcut spike | |
498 | // on the I/O-line. | |
499 | pinMode (DS1302_IO, INPUT); | |
500 | digitalWrite (DS1302_IO, LOW); // remove any pull-up | |
501 | } | |
502 | else | |
503 | { | |
504 | digitalWrite (DS1302_SCLK, LOW); | |
505 | delayMicroseconds(1); // tCL=1000ns, tCDD=800ns | |
506 | } | |
507 | } | |
508 | } | |
509 | void uurErbij(){ | |
510 | increaseHour = 1; | |
511 | Serial.println("bleep"); | |
512 | } | |
513 | void uur10Erbij(){ | |
514 | increaseHour10 = 1; | |
515 | Serial.println("bleepbleep"); | |
516 | } |